<template>
    <div class="app-container">
        <!-- <h1>1223444</h1> -->
        <!-- 顶部 Header 区域 -->
        <mt-header fixed title="Vue实战项目">
            <span slot="left" @click="goBack" v-show="back_flag">
                <mt-button icon="back">返回</mt-button>
            </span>
        </mt-header>

        <!-- 中间的 路由 router-viwe 区域 -->
		<transition>
			<router-view></router-view>
		</transition>


        <!-- 底部 tabbar导航栏 区域 -->
        <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-Snowyi" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-Snowyi" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-Snowyi" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
                    <span class="mui-badge" id="badge">{{ $store.getters.getAllCount }}</span>
            </span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-Snowyi" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
    </div>
</template>

<script> 
    export default {
        data(){
            return{
                back_flag: false,
            }
        },
        created(){ // 当页面刷时，应该判断当前页面是否为首页，如果不是应该出现 返回按钮
            this.back_flag = this.$route.path === '/home' ? false : true;
            // if(this.$route.path === '/home'){
            //         this.back_flag = false;
            // }else{
            //         this.back_flag = true;
            // }
        },
        methods: {
            goBack(){
                // hearder返回效果
                this.$router.go(-1);
            },
        },
        watch:{
            '$route.path':function(newVal){
                if( newVal === "/home" ){
                    this.back_flag = false;
                }else{
                        this.back_flag = true;
                }
            }
        }
    }
</script>

<style scoped>
body,h1{ padding: 0px; margin: 0px;}

.mint-header{
    z-index: 2;
}

.app-container{
	padding-top: 40px;
	padding-bottom: 50px;
	overflow-x: hidden; /* 横向如果超出宽度 隐藏超出部分*/
}

.v-enter {
  opacity: 0;
  transform: translateX(100%);
}
.v-leave-to {
  opacity: 0;
  transform: translateX(-100%);
  position: absolute;
}
.v-enter-active,
.v-leave-active {
  transition: all 0.5s ease;
}

.mui-bar-tab .mui-tab-item-Snowyi.mui-active {
    color: #007aff;
}

.mui-bar-tab .mui-tab-item-Snowyi {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-Snowyi .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}

.mui-bar-tab .mui-tab-item-Snowyi .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>